"What Drives Learning: Young People's Perspectives on the Importance of Relationships, Belonging, and Agency" is the third publication in the How Learning Happens research series. Together with "All of Who I Am" (see ED606338) and "The State of Young People during COVID-19," (see ED606305), this report places adolescents' experiences and perspectives at the center of an urgent national conversation about prioritizing young people's social, emotional, and cognitive development. Based on findings from a nationally representative survey of 3,300 high school students, "What Drives Learning" highlights the effect that supportive relationships, a sense of belonging, and feelings of agency can have on students' self-reported engagement and learning in school. [Support for this research was provided by Sanford Programs at National University System.]